Printing-machine.



PATENTED JULY 4, 1905.

W. SCOTT.

PRINTING MACHINE.

APPLIUATION YILED JAN. 21. 1904.

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SPECIFICATION forming part of Letters Patent No. 793,912, dated July 4t, 1905..

Application filed. January 27, 1904. Serial No. 190,778.

To (1/17 w/tont if; 7H/fI/Z/ concern:

Be it known that 1, W AL'rnn tloo'r'r, a citizen of the United liltates of America, and a resident of Plainfield, Union county, New Jersey, have invented certain new and useful improvements in lirinting-"Vlaehines, of which the 'following is a specification.

My invention relates to printing or other machines in which a reciprocating bed is used, and has more especially reference to the means :for reversing the motion of the bed at the end of its stroke in either direction.

in an applicatiol'i tiled April 15, 1901, tlerial lilo. 55,820, by myself jointly with Eugene "W. tlwindclls there was shown and claimed a reciprocating bed having two main racks, two slots, and two curved segments at each end, together with a driving-gear adapted to engage alternately with the main racks, a roll to engage with either side of the said slots to reverse the bed and to control the same during the reversing operation, and an auxiliary gear or pinion to engage with the curved racks at the end to bridge over or continue the motion while the d riving-gear is disengaging with one of the main racks and while the roll is about to engage with one of the slots, or vice versa. T his construction is full y set forth in the application above referred to and need not be further described here. Suliice it to say that the object of this construction to enable the roll to engage with the sides of the slot, so as to hold the bed from undue movement in either direction on the turning-point as soon as possible after the driving-gear has disengaged with one of the main racks and until the said driving-gear is about to engage with the other of the main racks.

In large machines where the moniientum of the bed is very heavy and the parts are com- 1)21il'2tf l\"(3l large I. tind it advantageous to provide each slot with an auxiliary shoulder of a greater length than the inside walls of the slots and located on the same side as the said inside walls of the slots, but nearer the opposite sides of the slots than the inside walls of the said slots, and the drivii'ig-gear with an auxiliary roll of a smaller diameter than the lirst-1nentioned roll and located concentrically of the said first-mentioncd roll :for engaging with the auxiliary shoulder on each slot, so as to control the parts before the first-mentioned roll enters either slot sulliciently to engage with the inside walls of the said slots, thus having the main roll of sullicient size and strength to overcome the inertia of the bed and reverse the same.

In the accom mnying drawings .l. have e1nbodied my invention in a suitable form; but changes may of course be made without departing from the spirit of my invention.

in the said drawings, Figure 1 is a side elcva tion of a reciprocating bed of a printing-press and the means for driving the same. Fig. 2 is a sectional View on the line 2 E2 of Fig. .1. Fig. 3 shows a modification.

tlimi lar characters of reference indicate corresponding parts in the views.

1 indicates the bed, in this case of a print ing-press, though the invention is not limited to the bed motion of a printing-press, carrying two main racks 2 2, two curved segments at each end 3 3, which may or may not be conti nuous; but, if desired, additional teeth, as 4i, can be interposed between the two curved segments, making them continuous, as shown in Fig. At each end there is further provided a slot, as 5, formed by the two shoes 6 and 7, 7 being the inside shoe.

8 is a driving-gear suitably mounted on the shaft 9 and adapted alternately to engage with the main racks 2 2 in a well-known manner. This driving-gear carries an auxiliary gear it), which may be in the form of a complete gear or in the form of a mutilated gear, depending on whether or not the two curved segments at the end are continuous 11 a roll placed preferably at the point where its center will be substantially halfway between the center and pitch line of the auxiliary gear and of a diameter snbstantiall y equal to the width of the slot Owing to the large size of the parts, it will be seen that the inside wall or shoe 7 of the slot is comparatively short, so that the bed might not at all times be controlled properly after the driving-gear has disengaged with one of the main racks and before the roll it engages with the said inside wall or shoe 7, or vice versa. To overcome this dill iculty, I

provide an auxiliary shoulder, as 12, greater length than the inside wall or shoe of the slot and nearer the opposite wall or shoe 6 of the said slot. To cooperate with this I provide an auxiliary roll, as 13, mounted in the present instance concentrically of the roll 11, but of a smaller diameter than the latter. By this means the auxiliary roll 13 will engage with the auxiliary shoulder 12 substantially at the moment the main drivinggear disengages with one of the main racks and substantially until the said driving-gear reengages with the other of the said main racks and before and after the roll 11 becomes effective with relation to the inside wall or shoe 7 of the slot. This construction will be readily understood by an inspection of Fig. 1 of the drawings, where the parts are shown in a position where the driving-gear is about to disengage one of the main racks and where the auxiliary roll is shown as engaging with the auxiliaryshoulder. Owing to the fact that the wall or shoe 6 of the slot 5 is longer than the shoe or wall 7 the roll 11 will become effective with relation to the shoe or wall 6 at the same moment and as long as the auxiliary roll 13 is effective with relation to the auxiliary shoulder 12.

I prefer to construct my machine with two curved segments at each end, which may or may not be connected by intermediate teeth, as previously pointed out. Of course if it is desired one continuous segment could be substituted with the same effect. I wish, however, to lay stress on the fact that a continuous segment is not necessary for the operation of my machine. The only purpose of having curved segments at the end is simply to bridge over or continue the motion before the roll engages with the slot and after the driving-gear has disengaged one of the racks, or vice versa.

The auxiliary shoulder 12 need not be continuous, as it is only designed to cooperate with the auxiliary roll 13 before and after the roll 11 controls the bed. In the drawings I have shown this auxiliary shoulder as being cut away at its central portion let, so that the strain will be thrown on the roll 11 only. This, in fact, is the preferred construction. From this it follows that the said auxiliary shoulder 1?. could be in the form of two shoes, one at each end of the slot, and the claims should be construed accordingly.

What I claim is 1. A reciprocating bed having two main racks, two segments at each end, and two slots, in combination with a d riving-gear caused to engage alternately with the main racks to reciprocate the said bed, an auxiliary gear car ried by the driving-gear to engage with the curved racks, and a roll to engage with either side of the said slots to reverse the motion of the bed and to control it while turning, an auxiliary shoulder of a greater length than of a l the inside wall of the slot and located on the same side as the said inside wall of the said slot and nearer to the opposite side of the said slot at each end, and an auxiliary roll of a smaller diameter than the first-mentioned roll on the gear for engaging with the auxiliary shoulder to control the parts before the firstmentioned roll enters the slots sufficiently to engage with the inside wall of the said slot. 2 A reciprocating bed having two main racks, two segments at each end, and two slots, in combination with a driving-gear caused to engage alternately with the main racks to reciprocate the said bed, an auxiliary gear carried by the driving-gear to engage with the curved racks, and a roll located at a point substantially half-way between the center and pitch line of the auxiliary gear to engage with either side of the said slots to reverse the motion of the bed and to control it while turning, an auxiliaryshoulder of a greater length than the inside wall of the slot and located on the same side as the said inside wall of the said slot and nearer to the opposite side of the said slot at each end, and an auxiliary roll concentric of the first-mentioned roll of a smaller diameter than the first-mentioned roll on the gear for engaging with the auxiliary shoulder to control the parts before the firstmentioned roll enters the slots sulficiently to engage with the inside wall of the said slot.

3. The combination of a reciprocating bed, having two main racks, a slot at each end of the racks, and two curved segments intermediate the two main racks at each end, a driving-gear adapted to engage alternately with the said racks to reciprocate the bed, a friction-roll carried by the gear adapted to engage with either side of the slot to reverse the motion of the bed and to control it while turning, an auxiliary gear carried by the driving-gear adapted to coact with the curved segments to continue the movement of the bed while the racks disengage with the driving-gear, and while the roll is entering into engagement with the slot or vice versa, and an auxiliary shoulder of a greater length than the inside wall of the slot and located on the same side as the said inside wall at each end and nearer to the opposite wall of the slot than the said inside wall, and an auxiliary roll of a smaller diameter than the first-mentioned roll on the gear for engaging with the auxiliary shoulder to control the parts before the first-mentioned roll enters the slot sufliciently to engage with the inside wall of the said slot.

4;. The combination of a reciprocating bed, having two main racks, a slot at each end of the racks, and two curved segments intermediate the two main racks at each end, a drivinggear adapted to engage alternately with the said racks to reciprocate the bed, a frictionroll located at a point substantially half-way between the center and pitch line of the auxiliary gear carried by the gear adapted to engage with either side of the slot to reverse the motion of the bed and to control it while turning, an aimiliary gear carried by the driving-gear adapted to coact the curved segments to continue the movement of the bed while the racks disengage with the driving gear, and while the roll is entering into ongagement with the slot or vice versa, and an auxiliary shoulder oi a greater length than the inside wall of the slot and located on the same side as the said inside wall at each end and nearer to the opposite wall of the slot than the said inside wall, and an auxiliary roll concentric ol the first-mentioned roll 01 a smaller diameter than the first-mentioned roll on the gear for engaging with the auxiliary shoulder to control the parts before the lirstanentioned roll enters the slot sul'ticientl y to engage with the inside wall ol the said slot.

A reciprocating bed having two main racks, two segments at each end, and two slots, in comljiination with a driving-gear caused to engage alternately with the main racks to reciprocate the said bed, an auxiliary gear carried by the driving-gear to engage with the curved racks, and a roll to engage with either side of the said slots to reverse the motion of the bed and to control it while turning, an auxiliary shoulder of a greater length than the inside all of the slot and located on the same side as the said inside wall of the said slot and nearer to the opposite side of the said slot at each end, and an auxiliary roll of a smaller diameter than the l'irst-mentioned roll on the gear for engaging with the auxiliary shoulder to control the parts before the first-mentioned roll enters the slots suliicicntly to engage with the inside wall ol the said slot, and intermediate teeth connecting said curved segments at each end.

6. A reciprocating bed having two main racks, two segments at each end, and two slots, in combination with a driving-gear caused to engage alternately with the main racks to reciprocate the said bed, an auxiliary gear carried by the driving-gear to engage with the curved racks, and a roll located at a point suhstantially halt-way between the center and pitch line of the auxiliary gear to engage with either side of the said slots to reverse the motion 01 the bed and to control it while tnrlling, an auxiliary shoulder o l a greater length than the inside wall of the slot and located on the same side as the said inside wall oi the said slot and nearer to the opposite side of the said slot at each end, an auxiliary roll concentric oi the first-mentioned roll of a smaller diameter than the lirstanentioned roll on the gear l'or engaging with the auxiliary shoulder to control the parts before the first-mentioned roll enters the slots suliiciently to engage with the inside wall of the said slot, and in termedi- I ate teeth connectii'ig said curved segments at 1 each end.

W t witiillt 7. The combination of a reciprocating bed, having two main racks, a slot at each end ol the racks, and two curved segn'ients intermediate the two main racks at each end, a driving-gear adapted to engage alternately with the said racks to reciprocate the bed, a friction-roll carried by the gear adapted to engage with either side ol the slot to reverse the motion 01 the bed and to control it while turning, an auxiliary gear carried by the driving-gear adapted to coact the curved segments to continue the IDOVCH'lOnt ol the bed while the raelzs disengage with the driving-gear, and while the roll is entering into engagement with the slot or vice versa, an auxiliary shoulder 0] a greater length than the inside wall of the slot and located on the same side as the said inside wall at each end and nearer to the opposite wall of the slot than the said inside wall, an auxiliary roll of a smaller diameter than the lirst-n'ientioned roll on the gear for engaging with the auxiliary shoulder to control the parts before the first-mentioned roll enters the slot sutliciently to engage with the inside wall of the said slot, and intermediate teeth connectingsaid curved segments at each end.

8. The combination of a reeinrocatil'ig bed, having two main racks, a slot at each end of the racks, and two curved segments intermediate the two main racks at each end, a driving-gear adapted to engage altm'nzdxely with the said racks to reciprocate the bed, a friction-roll located at a point substantially half-way between the center and pitch line of the auxiliary gear carried by the gear adapt ed to engage with either side of the slot to reverse the motion oi the bed and to control it while turning, an auxiliary gear carried by the drivinggear adapted to coact with. the curved segments to continue the movement of the bed while the racks disengage with the driving-gear, and while the roll is entering into engagement with the slot or vice versa, an auxiliary shoulder ol a greater length than the inside wall of the slot and located on the same side as the said inside wall at each end and nearer to the opposite wall ot the slot than the said inside wall, an auxiliary roll concentric of the first-1nentioned roll 0]? a smaller diameter than the first-mentioned roll on the gear for engaging with the auxiliary shoulder to control the parts before the lirstmentioned roll enters the slot sutiiciently to engage with the inside of the said slot, and intermediate teeth connecting said curved segments at each end.

tiigned at New Yorl: this 26th day of Jan uary, 190st.

i'Vi tuesses'.

AXE]; V. Ilhqnui'in, llamas M. tin-inane. 

